Pole base loading apparatus and main chassis for magnetic recording/reading device

1. A pole base loading apparatus for a magnetic recording/reading device, comprising: a pair of pole base units reciprocating on a main chassis and guiding a tape to be wound around a head drum; a pair of loading gears respectively linked to the pole base units and gear-engaged with each other; and a loading unit for rotating the loading gears, wherein at least one of the loading gears further comprises a hook for coupling the gear to the main chassis, wherein the main chassis comprises a guide part for receiving and guiding the hook, wherein the guide part comprises an escape part having an extended outer diameter formed at one end of the guide part so as to allow a free entrance of the hook and wherein the hook can be moved by a rotation of the loading gear.

2. The pole base loading apparatus as claimed in claim 1 , wherein the hook is integrally formed with the loading gear.

3. The pole base loading apparatus as claimed in claim 1 , wherein the guide part further comprises a lesser outer diameter part so as to couple the hook to the main chassis.

4. The pole base loading apparatus as claimed in claim 1 , wherein the pair of loading gears comprise: a first loading gear rotatably inserted onto a first shaft part projected from a lower part of the main chassis; and a second loading gear having a small-scaled gear part rotatably inserted onto a second shaft part projected from the lower part of the main chassis and gear-engaged with the first loading gear, a large-scaled gear part connected to a loading unit and capturing the first loading gear so as to prevent the first loading gear from escaping the first shaft part, and the hook for coupling the second loading gear to the main chassis via the guide part.

5. A main chassis for a magnetic recording/reading device, comprising: a head drum for recording information on a tape and reading the information recorded on the tape; a pair of pole base units for guiding a tape so that the tape is wound around the head drum; a pair of loading gears linked to the pole base units, for rotating around shaft parts, respectively; a hook integrally formed with at least one of the loading gears; and a guide part installed around a shaft part of at least one of the pairs of loading gears for supporting and guiding the loading gears, wherein the guide part comprises a slit for guiding the hook and coupling the hook to the main chassis, and an escape part having an extended outer diameter formed at one end of the guide part so as to allow a free entrance of the hook.